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sd-dhcp-server: improve predictability of leases
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cgls/cgtop: a variety of modernizations
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Rather than having all clients attempt to get the same leases (starting at the
beginning of the pool), make each client star at a random offset into the pool
determined by their client id. This greatly increases the chances of a given
client receiving the same IP address even though both the client and server
have lost any lease information (and distinct server instances handing out
the same leases).
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cgroup-show: unescape cgroups on presentation
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A few auto-pager improvements
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Fix --machine= handling, don't hardcode long-obsolete container
cgroup paths
Many other clean-ups.
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In preparation of the unified cgroup support, let's clean up cgtop:
a) rework time code to be based on "nsec_t" rather than "struct timespec"
b) Introduce long option --order= for selecting ordering
c) count number of processes only in the main hierarchy, don't bother
with the controller hierarchies. We don't allow orthogonal
hierarchies in systemd anymore, hence there's no point to check the
other hierarchies.
d) Deal with non-monotonic cpuacct values (see #749)
e) When sorting groups, don't do prefix compare when ordering by number
of tasks, since this is not accumulative for all children.
f) Actually make --cpu without parameter work
g) Don't output control characters when we get them as input.
Fixes #749.
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Let's add a way to get the type-specific D-Bus interface of a unit from
either its type or name to src/basic/unit-name.[ch]. That way we can
share it with the client side, where it is useful in tools like cgls or
machinectl.
Also ports over machinectl to make use of this.
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Let's unescape cgroups on presentation, so that we show literal unit
names.
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It's really confusing if stdout goes to the pager, but stderr is written
directly to the screen. Hence, make sure both stdout and stderr are
passed to the pager when doing autopaging.
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Apparently, sendfile() does not work between fifos and ttys, but
splice() does, hence let's optionally fall back to that. This is useful
to implement the fallback pager this way.
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sd-resolve: drop res_query() API
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Various networkd and dhcp updates
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Querying low-level DNS RRs should be done via resolved now, not via
glibc's awful res_query() API anymore. Let's not introduce an async
wrapper for it hence.
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A follow-up to 3733eec3e292e4ddb4cba5eb8d3bd8cbee7102d8
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Fixes fallout from 3733eec3e292e4ddb4cba5eb8d3bd8cbee7102d8.
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Let's do this everywhere the same way.
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Otherwise we'll try to remove an invalid fd from epoll all the time.
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If we have the data, emit it by default.
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When handing out DHCP leases, try to propagate DNS/NTP server
information from "uplink". The "uplink" is automatically determined as
the network interface with the highest priority default route on it.
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We should not fall back to dbus-1 and connect to the proxy when kdbus
returns an error that indicates that kdbus is running but just does not
accept new connections because of quota limits or something similar.
Based on a patch by Kay.
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This reverts commit d4d00020d6ad855d65d31020fefa5003e1bb477f. The idea of
the commit is broken and needs to be reworked. We really cannot reduce
the bus-addresses to a single address. We always will have systemd with
native clients and legacy clients at the same time, so we also need both
addresses at the same time.
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It is not acceptable to load unit files during enable/disable operations
just to figure out the selinux labels. systemd implements lazy loading
for units, so the selinux hooks need to follow it.
This drops the mac_selinux_unit_access_check_strv() helper which
implements a non-acceptable policy check. If anyone cares for that
functionality, you really should pass a callback+userdata to the helpers
in src/shared/install.c which does policy checks on each touched file.
See #1050 on github for more.
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We use dashes in our bloom-tags. Make sure the newly introduced arg0has
tag uses the same style.
Note that the external dbus-tags don't use dashes, though. They are
defined in the spec and we need to keep compatibility there.
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sd-bus: introduce new match type "arg0has=" for matching arrays of st…
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sd-bus: introduce new SD_BUS_VTABLE_PROPERTY_EXPLICIT flag
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For now, this is very simple and IP addresses have to be configured
manually.
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No functional changes, just moving definitions into separate header
files.
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Let's drop some strerror() invocations, and make use of the easier to
use newer logging APIs.
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It's an OK way to check whether a message contains an erro, let's not
consider this a loggable assertion event.
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Previously we were setting the transient hostname again, rather than
resetting it.
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Don't underflow when calculating lease time.
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The library so far always requested the NTP servers. This might be
unnecessary in some uses, hence let's move the request into networkd
instead.
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a) drop handling of obsolete or unused DHCP options time_offset,
mtu_aging_timeout, policy filter, mdr, ttl, ip forwarding settings.
Should this become useful one day we can readd support for this.
b) For subnet mask and broadcast it is not always clear whether 0 or
255.255.255.255 might be valid, hence maintain a boolean indicating
validity next to it.
c) serialize/deserialize broadcast address, lifetime, T1 and T2 together
with the rest of the fields in dhcp_lease_save() and
dhcp_lease_load().
d) consistently return ENODATA from getter functions for data that is
missing in the lease.
e) add missing getter calls for broadcast, lifetime, T1, T2.
f) when decoding DHCP options, generate debug messages on parse
failures, but try to proceed if possible.
g) Similar, when deserializing a lease in dhcp_lease_load(), make sure
we deal nicely with unparsable fields, to provide upgrade compat.
h) fix some memory allocations
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This avoids confusion what this is, in particular as libc knows an
index() function.
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If we handly arbitrary data we should use "void*" pointers, not
"uint8_t*", how go intended C to be used.
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Everywhere else we call the generic user data pointer just "userdata",
rather than "user_data". Let's do this here, too.
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We place the opening bracket of a function on the same line as the
function name. Let's do so in the DHCP sources too.
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No need to invole atomic ops in single-threaded APIs, let's simplify
this.
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refcnt.h only exists for cases where objects are simultaneously handled
by different threads. Otherwise it should not be used. The only case
where this applies is sd_bus, really, and pretty much none of our APIs,
since we do not claim thread-safety for them.
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When we make sd-dhcp public one day we really should not make
sd_dhcp_lease_save() and sd_dhcp_lease_load() public, since it's pretty
much only useful as internal utility for networkd itself.
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